(unstack b4 b6)
(putdown b4)
(unstack b5 b1)
(stack b5 b6)
(unstack b1 b3)
(stack b1 b4)
(pickup b3)
(stack b3 b5)
(unstack b8 b9)
(stack b8 b3)
(unstack b9 b7)
(putdown b9)
(unstack b7 b2)
(stack b7 b8)
(pickup b2)
(stack b2 b7)
(unstack b1 b4)
(stack b1 b2)
(pickup b4)
(stack b4 b1)
(pickup b9)
(stack b9 b4)
; cost = 22 (unit cost)
